Siemens S5-135U/155U - Manual (Page 38)

3-12
System Manual
C79000-G8576-C199-06
3.3 Wiring of Programmable Controllers for EMC
The following section describes:
S
Routing of cables within and outside cabinets
S
Equipotential bonding between devices
S
Single and double-ended connection of cable shields
S
Checklist for electromagnetically compatible installation
3.3.1 Routing of Cables
This section covers the routing of bus, signal and supply lines. The purpose
cable routing is to suppress crosstalk between cables laid in parallel.
For electromagnetically compatible routing of cables and lines, it is
expedient to subdivide the lines into the following line groups and lay the
groups separately.
S
Shielded bus and data lines (for programmer, OP, SINEC L1, SINEC L2,
printer, etc.)
S
Shielded analog lines
S
Unshielded lines for DC voltage
v 60 V
S
Unshielded lines for AC voltage
v 25 V
S
Coaxial cables for monitors
S
Unshielded lines for DC voltage > 60V and
v 400V
S
Unshielded lines for AC voltage > 25V and
v 400V
S
Unshielded lines for DC and AC voltage > 400V
S
Lines for SINEC H1
From the combination of individual groups in the following table, you can
read off the conditions for laying the line groups.
Group A Group B Group C Group D
Group A
А Б В Г
Group B
Б А В Г
Group C
В В А Г
Group D
Г Г Г А
Routing of Cables
Within and
Outside Cabinets
Group A
Group B
Group C
Group D
Installation Guidelines